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2. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   Class A are either an insulated, double wall stainless steel pipe or triple wall, air-insulated pipe often known by its genericized trade name Metalbestos. Class B are uninsulated double wall pipes often called B-vent, and are only used to vent non-condensing gas appliances. These may have an aluminum inside layer and galvanized steel outside ...

3. Double-walled pipe - Wikipedia

   en.wikipedia.org/wiki/Double-walled_pipe

   It is a pipe within a pipe, or encased in an outer covering, with an annulus (interstitial space) between the two diameters. The inner pipe is the primary or carrier pipe and the outer pipe is called the secondary or containment pipe. The great majority of double-walled piping applications involve wastewater, groundwater, and process safety. [1]

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   The bodies of fittings for pipe and tubing are often the same base material as the pipe or tubing connected: copper, steel, PVC, CPVC, or ABS. Any material permitted by the plumbing, health, or building code (as applicable) may be used, but it must be compatible with the other materials in the system, the fluids being transported, and the ...

5. Pat Riley says Heat are not trading Jimmy Butler - AOL

   www.aol.com/pat-riley-says-heat-not-190552693.html

   Six-time All-Star Jimmy Butler isn't going anywhere, Miami Heat team president Pat Riley announced Thursday. "We usually don't comment on rumors, but all this speculation has become a distraction ...

6. Drug cartel boss Osiel Cardenas, known for extreme violence ...

   www.aol.com/news/us-deports-notorious-drug-lord...

   MEXICO CITY (Reuters) -The U.S. government deported drug lord Osiel Cardenas on Monday, transferring custody of the ex-Gulf Cartel chief known for hyper-violent tactics to Mexican authorities at ...

7. Archaeologists Found 115,000-Year-Old Human Footprints Where ...

   www.aol.com/lifestyle/archaeologists-found-115...

   “An experimental study of modern human footprints in mud flats found that fine details were lost within 2 days and prints were rendered unrecognizable within four, and similar observations have ...